The dynamic parameters of high-speed train axle box bearing have time-varying characteristics, it is necessary to investigate the influence of time-varying characteristics on the dynamic response of the bearing. In this paper, based on the time-varying characteristics of the internal and external dynamic parameters of the bearing, a two-degree-of-freedom dynamic model of axle box bearing is established. The dynamic responses of bearings with different ranges of outer raceway defects are analyzed, and the similarities and differences between the varying compliance vibration and outer ring raceway defect fault vibration are compared. The results show that these two vibration modes have the same characteristic frequency, but the contact force between rollers and raceways and vibration acceleration amplitudes are greatly different. Finally, the effectiveness of the established dynamic model is verified through monitoring signal on the operation high-speed railway line.

中文翻译：

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考虑时变动力学参数的高速列车轴箱轴承动力响应分析


高速列车轴箱轴承的动力学参数具有时变特性，有必要研究时变特性对轴承动态响应的影响。本文基于轴承内外动力学参数的时变特性，建立了轴箱轴承的二自由度动力学模型。分析了不同范围外滚道缺陷的轴承的动力响应，比较了不同柔度振动与外圈滚道缺陷故障振动的异同。结果表明，这两种振动模式具有相同的特征频率，但滚子与滚道之间的接触力和振动加速度幅度差异很大。最后，通过对运营高速铁路线路的监测信号，验证了所建立的动力学模型的有效性。